/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraDataInterfaceSkeletalMesh.h
Triangle sampling Triangles are sampled a using MeshTriangleCoordinates which are composed of Triangle index and a bary centric coordinate on that triangle.
void GetTriangleSamplingFunctions ( [TArray](API\Runtime\Core\Containers\TArray)< [FNiagaraFunctionSignature](API\Plugins\Niagara\FNiagaraFunctionSignature) > & OutFunctions )